Superior DIRECT VENT 600 Installation Instructions Manual page 27

Step 1. Turn off the gas supply to the appliance.
Remove the front glass door/frame from the
appliance. Access the control compartment.
Step 2. Carefully remove the logs. Exercise
care so as not to break the logs.
Step 3. Locate the screws securing the burner
(tray) to the appliance. Remove the burner and
retain the securing screws.
Step 4. Millivolt Appliances - SIT Systems
a. Refer to Figure 62 and the instructions
provided with the kit. Using a Torx T20, remove
and discard the three pressure regulator mount-
ing screws. Remove the pressure regulator,
spring, poppet, diaphragm and bushing. Dis-
card all removed components. Ensure the
rubber gasket installed on the back of the
replacement pressure regulator is properly
positioned and install the new pressure regula-
tor using the new screws supplied with the kit.
Tighten screws to 25 In. lb. torque.
SIT Millivolt Gas Valve
Pressure
Regulator
Remove
These
Components
Figure 62
Pilot for SIT Millivolt Gas Valve
Pilot
Orifice
Figure 63
b. Attach manometer to the manifold side
pressure test fitting and verify manifold pres-
sure reads 3.5 inches water column (0.87 kPa)
for natural gas, and 10.0 inches water column
(2.49 kPa) for propane gas.
Pilot for Honeywell Millivolt Gas Valve
(Loosening of Hex Fitting For Orifice Strip Tab Positioning)
Hood
7/16 in. Open End Wrench
Orifice Strip Tab
Figure 64
Pilot for Honeywell Millivolt Gas Valve
LP/Propane Gas Position -
1/16 in. Hole, LP and
Red Color shown on tab
Figure 65
Top View of Hex Fitting and Orifice Strip Tab
Pilot for Honeywell Millivolt Gas Valve Orifice Strip Tab Positioning
Figure 66
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
c. Refer to Figure 63 and remove the pilot
hood assembly to access the hexed pilot ori-
fice. Remove and replace the orifice with the
one provided with the kit.
Take Care Not to Contact the Orifice Strip Tab
with the Hex Fitting Wrench - Distortion of the Tab
May Render the Pilot Inoperative.
Orifice Strip Tab Position Identification
For LP/Propane and Natural Gas
Natural Gas Position -
Pilot Hood Position After
Loosening Hex Fitting 1/4 Turn
Orifice Strip Tab
Push Tab to Set
Gas Type Usage
Note - Orifice Strip Tab May
Be Randomly Located On Any
Side Of The Hex Fitting
Hood Alignment
NAT shown on tab
27